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Creating Xamarin Android SwipeRefreshLayout Using ListView Items

Let’s start,

Step 1: Open Visual Studio->New Project->Templates->Visual C#->Android->Blank App

Select Blank App. Give the Project Name and Project Location.



Step 2

Go to Solution Explorer-> Project Name-> Components, right click to Get More Components and the new dialog box opens. This dialog box is required to search the Support V4, add the Android Support Library V4 Packages.


 

Step 3: To open Solution Explorer, go to -> Project Name->Resources->layout ->Main.axml, click to open Design View and the code, given below:


 

  1. <android.support.v4.widget.SwipeRefreshLayout  
  2. android:id="@+id/swipeRefreshLayout"    
  3. android:layout_width="match_parent"    
  4. android:layout_height="match_parent"    
  5. android:layout_above="@+id/btnaddnewmech"    
  6. android:layout_alignParentTop="true">    
  7. <ListView    
  8. android:minWidth="25px"    
  9. android:minHeight="25px"    
  10. android:layout_width="match_parent"    
  11. android:layout_height="match_parent"    
  12. android:id="@+id/listView1" />    
  13. </android.support.v4.widget.SwipeRefreshLayout>  

Step 4: After Design view creation, open Solution Explorer-> Project Name->MainActivity.cs, add the namespaces, given below:

  1. using Android.Support.V4.Widget;    
  2. using Android.Graphics;    
  3. using System.Collections.Generic;    
  4. using System.ComponentModel;    
  5. using Java.Lang;  

Step 5: To create the new variables for RefreshLayout and ListView, one can use the code, given below:

 

  1. private SwipeRefreshLayout refreshLayout;    
  2. private ListView listitem;  

Step 6: Go to Oncreate() to declare the list view id and Listview<string>Variable.

Step 7: Next step is to create one List String Item and then add the list view adapter.


C# Code

  1. listitem = FindViewById < ListView > (Resource.Id.listView1);  
  2. List < string > items = new List < string > ();  
  3. items.Add("C#");  
  4. items.Add("ASP.NET");  
  5. items.Add("JAVA");  
  6. items.Add("MVC");  
  7. items.Add("Swift");  
  8. items.Add("JQuery");  
  9. items.Add("ASP");  
  10. items.Add("JSP");  
  11. items.Add("C");  
  12. items.Add("PHP");  
  13. items.Add("Ruby");  
  14. ArrayAdapter < string > liststring = new ArrayAdapter < string > (this, Android.Resource.Layout.SimpleExpandableListItem1, items);  
  15. listitem.Adapter = liststring;  

Step 8

After Listview declaration, assign Refresh Layout variables and colors. Here, create one more method for Refresh event. This event is declared after Oncreate().
 

C# Code

  1. refreshLayout = FindViewById < SwipeRefreshLayout > (Resource.Id.swipeRefreshLayout);  
  2. refreshLayout.SetColorSchemeColors(Color.Red, Color.Green, Color.Blue, Color.Yellow);  
  3. refreshLayout.Refresh += RefreshLayout_Refresh;  

Step 9

Declare RefreshLayout_refresh method. This method is working in the background process of the layout. Once the work completes, it will terminate the work.
 
C# Code

  1. private void RefreshLayout_Refresh(object sender, EventArgs e)  
  2. {  
  3.     //Data Refresh Place  
  4.     BackgroundWorker work = new BackgroundWorker();  
  5.     work.DoWork += Work_DoWork;  
  6.     work.RunWorkerCompleted += Work_RunWorkerCompleted;  
  7.     work.RunWorkerAsync();  
  8. }  
  9. private void Work_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {  
  10.     refreshLayout.Refreshing = false;  
  11. }  
  12. private void Work_DoWork(object sender, DoWorkEventArgs e) {  
  13.     Thread.Sleep(1000);  
  14. }  

Step 10: Press F5 or build and run the Application.



Finally, we successfully created Xamarin Android SwipeRefreshLayout with ListView items.


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